Electric toothbrush



FIG. 1 is a front, top and right side perspective view of an electric toothbrush, showing my design;

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a left side elevation thereof.

FIG. 5 is a right side elevation thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings depict environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for an electric toothbrush, as shown and described. 